Which class of drugs helps with nausea and vomiting that are side effects of other medications?

The correct choice is a class of medications specifically designed to prevent or alleviate nausea and vomiting, commonly referred to as antiemetics. These drugs function by blocking specific neurotransmitters in the brain or gastrointestinal tract that trigger the vomiting reflex. For example, some antiemetics target serotonin receptors or dopamine receptors, effectively managing the side effects that can arise from other medications, such as chemotherapy agents or opioids.

In comparison, antisecretory drugs primarily reduce gastric acid secretion and are generally used for conditions like peptic ulcers and gastroesophageal reflux disease, not specifically for nausea or vomiting. Antidiarrheal drugs focus on managing diarrhea by slowing down bowel movements or increasing the absorption of fluids in the intestines, and laxative drugs are utilized to relieve constipation but do not address nausea or vomiting. Thus, antiemetic drugs are unique in their targeted approach to managing nausea and vomiting, making them the right choice for this question.